I'm sorry.
I'm a heart patient, too. Because EP studies are done in such a controlled environment it is fairly safe, but honestly far from risk free. I was offered an electrical ablation for sinus tachy (not A fib), but it came with the warning that there was a 1/5 to 1/4 chance of getting a pacemaker that day. My symptoms are benign and not bad with meds, so obviously I declined. I'm not sure of the pacemaker rate if done for A fib. But..a pacemaker is far from the end of the world.
An alcohol ablation is something different. It is used to cause part of the heart muscle to shrink so blood can flow better. I have cardiomyopathy, so a few doctors have thrown this out there (except my case is too mild). Anyway, it is not exactly trusted fully long term.
Will be thinking of him...